Guard for phonograph reproducers



Feb. 9 1926. 1,572,088

C. E. SEMPLE, JR

GUARD FOR PHONOGRAPH REPRODUCERS Original Filed May 24. 1922 gnuulfoz fl CkarZasEfflem 16,071.,

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Patented Feb. 9, 1926.

UNITED STATES PATENT OFFICE.

CHARLES E. sniurrn, in, or YoUNesrown, oHIo.

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Original application filed May 24, 1922, Serial No. 563,4 42. Divided and. this i 1923. Sci-m1 N0. 640,929.

To all whom it may concern lie it known that I, CHARLES E. SEMPLE, n, citizen of the United States, residing at Youngstown, in the county of Mahoning and State ofOhio, have invented certain new and useful, Improvements in .Guards for Phonograph Reproducers, of which the followiiig is a specification. y

This invention relates to reproducers for phonographs and the like, and more particularly to a novel guard device for the stylus bar construction and mounting'shown and described in, my co-pending application Serial Number 563,4l2, filed May 24:, 1922, which issued Jan. 15, 1924, as Pat. 1,480,786, and of which the present case is a division.

In the application above referred to, it was the object to provide an extremely sensitive stylus bar mounting which avoided to a maximum extent foreign sounds, blasts and the like, thereby, greatly enhancing the haracter of the reproduction. To that end, die invention provided a novel construction in which the stylus bar and'diaphragm are held in unitary relation and in balanced tension thereby avoiding undue strain upon the diaphragm.

In order topreserve the proper relation of the parts of the stylus bar construction contributing to the above novel result, it is necessary to provide suitablemeans for protecting and guarding the same so as to prevent the brea ring or disarrangement of parts during the handling of the reproducer, and to also protect the stylus parts in event that the diaphragm should fall.

Accordingly, a primary object of the presentinvention is to provide a novel guard for preventing the stylus bar from digging into or cutting the record should the reproducer be loosely or carelessly mounted on the tone arm; and to also effectually protect the stylus parts under all conditions of use.

A further object of the invention is to provide a stiffened and strengthened mounting for the stylus bar construction, such stiffening and strengthening being largely due to the arrangement and attachment of the guard device.

lVith the above and other objects in view which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, comtination and arrangement or" parts, hereinapplication filed May 23,

after more fully described, illustrated and claimed.

A preferred. and practical embodiment of the invention is shown in the accompanying drawings, in which:

Figure 1 is a plan view of a reproducer showing the present guard device.

Figure 2 is a vertical sectional view of a reproducer having the present guard device applied thereto.

- tween the stylus barA and the diaphragm D.

Referring more particularly .to the stylus bar A, it will be observed that the same is preferably provided with a head 1 for carrying a stylus point while the body 2 is provided with the oppositely extending Knife-edges 3 for engaging in the troughed seats 4. of the support or bridge piece 5 carried by the frame F ofthe reproducer. V

For the purpose of protecting the above mentioned elements, namely the stylus bar A, balancing bar B, tensioning device O and link L against injury during the handling of the reproducer, the outer face of the bridge or support 5 is provided with a guard G- which overlies and protects these elements as at G and G in Figure 1. To provide the necessary clearance for the stylus point carried by the head 1 of the stylus bar A, the body of the guard has an opening G, while the lateral eXtensionsGr permit of the guard being attached to the bridge by means of screws or equivalent fasteners.

In addition to the guard G overlying and protecting the stylus bar ele1nents, it serves to materially strengthen and stiffen the bridge piece 5. Due to the fact that, the

bridge piece is cut away at its intermediate portion to receive the part A of the stylus construction, the said bridge piece is reduced in thickness and under some condi tions of use there is a tendency for the bridge piece to give way or weaken, thereby causing stiffen the bridge piece in some way, asfor example, attaching the guard Gr thereto to serve as a reinforcing. v

i From the foregoing, it will be apparent that the present invention contemplates mounting a bridge piece on the reproducer frame, thereby to mount thestylus bar construction, together with a fixed guard at tached to the bridge and overlying and paralleling the main stylus member and masking the point of connection of the said main stylus member with the link at the center of the diaphragm.

Without further description, it is thought that the-many features and advantages of the present invention will be readily apparent and it will, of course, beunderstood that various changes in the form, proportion, and minor details of construction may be resorted to without departing from the spirit of the invention, or scope of the appended claims. r

I claim; a r a 1. A sound reproducer of the class described-having a bridge piece mounted on the reproducer "frame, a stylus member mounted on said bridge piece, and a fixed guard attached to the'bridge piece and paralleling the stylus member, the other end of the guard member masking the stylus connection overthe center of the diaphragnn 2. In a sound reproducer of the class described, a bridge piece mounted on the reproducer frame, a stylus member pivotally mounted on said bridge piece and having a stylus point'disposed at right angles to the diaphragm, and a guard member carried by the bridge piece and having an openin for permitting the stylus point to'proyect tierethrough, and said guard member paralleling the stylus member and masking the stylus member connection with the central portion of the diaphragm.

3Q In a sound reproducer of theclass described, a bridge piece mounted on the reproducer frame and overlyin a portion of the diaphragm, a stylus mem er pivoted in saidbridge piece and having one end connected with the diaphragm and the opposite end carrying a stylus point arranged parallel with the connection between the stylus member and the diaphragm, and a guard member carried by the bridge piece and provided with an opening registering with the stylus point and also extending over the stylus member to mask the connection thereof with the diaphragm.

4. In a sound reproducer of the class described, a bridge piece mounted on'the reproducer and having .a recessed seat, a stylus extending substantially-parallel with the diaphragm and having a stylus point disposed substantially at right angles to the diaphragm, and a guard member having laterally projecting wings adapted to be secured to the bridge piece and also compris- Y ing a body portion formed with an opening stylus'bar, and a'inember constituting means for covering the said seat and also reinforcmember pivoted in said recessed seat and I ing and stiffening said bridge piece in the 86 zone of the seat.

Intestimony whereof I hereunto a'llix my s1 gn ature.

CHARLES E. s MrLu, Ja. 

